Metal Bars Inc.
14530 S. Marquardt Ave.
Santa Fe Springs, CA
90670

(562) 921-8484
(714) 994-5901
Toll Free Outside
L.A. and O.C.
1-888-724-7644
TOLERANCES REFERENCE TABLES
STRAIGHTNESS TOLERANCES
FORM - SIZE LENGTH IN FEET MAXIMUM CURVATURE
(Depth of Arc) IN INCHES
ROUNDS
Less than .28 Carbon
Less than 5/8" Less than 15' 1/8" in any 10' portion of the total length
Less than 5/8" 15' and Over 1/8" in any 10' portion of the total length
5/8" and Over Less than 15' 1/16" in any 10' portion of the total length
5/8" and Over 15' and Over 1/8" in any 10' portion of the total length
.28 Carbon and Over and all Heat Treated Material
Less than 5/8" Less than 15' 3/16" in any 10' portion of the total length
Less than 5/8" 15' and Over 5/16" in any 10' portion of the total length
5/8" and Over Less than 15' 1/8" in any 10' portion of the total length
5/8" and Over 15' and Over 3/16" in any 10' portion of the total length
HEXAGONS, OCTAGONS AND SQUARES
Less than .28 Carbon
Less than 5/8" Less than 15' 3/16" in any 10' portion of the total length
Less than 5/8" 15' and Over 5/16" in any 10' portion of the total length
5/8" and Over Less than 15' 1/8" in any 10' portion of the total length
5/8" and Over 15' and Over 3/16" in any 10' portion of the total length
.28 Carbon and Over and all Heat Treated Material
Less than 5/8" Less than 15' 1/4" in any 10' portion of the total length
Less than 5/8" 15' and Over 3/8" in any 10' portion of the total length
5/8" and Over Less than 15' 3/16" in any 10' portion of the total length
5/8" and Over 15' and Over 1/4" in any 10' portion of the total length
Departure from straightness shall be measured by placing the rod or shapes on a level table so that the arc of departure from straightness is horizontal, and the depth of arc measured with a steel scale and a straight edge.

DIMENSIONAL TOLERANCES
Tolerances Provide For Undersize Variation Only
SIZE RANGE
In Inches
MAXIMUM OF CARBON
Range 0.28% or Less
MAXIMUM OF CARBON
Range Over 0.28% / 0.55% Incl.
ROUNDS - COLD DRAWN OR TURNED AND POLISHED
To 1-1/2" Incl. .002" .003"
Over 1-1/2" to 2-1/2" Incl. .003" .004"
Over 2-1/2" to 4" Incl. .004" .005"
Over 4" to 6" Incl. .005" .006"
Over 6" to 8" Incl. .006" .007
Over 8" to 9" Incl. .007" .008"
HEXAGONS - COLD DRAWN
To 3/4" Incl. .002" .003"
Over 3/4" to 1-1/2" Incl. .003" .004"
Over 1-1/2 to 2-1/2" Incl. .004" .005"
Over 2-1/2" to 4" Incl. .005" .006"
SQUARES - COLD DRAWN
To 3/4" Incl. .002" .004"
Over 3/4" to 1-1/2" Incl. .003" .005"
Over 1-1/2" to 2-1/2" Incl. .004" .006"
Over 2-1/2" to 4" Incl. .005" .008"
Over 4" to 5" Incl. .010"
FLATS (NOTE) - COLD DRAWN
WIDTH IN INCHES
To 3/4" Incl.
.003" .004"
Over 3/4" to 1-1/2" Incl. .004" .005"
Over 1-1/2" to 3" Incl. .005" .006"
Over 3" to 4" Incl. .006" .008"
4" to 6" Incl. .008" .010"
Over 6" .013 .015"
This table includes tolerances for bars that have not been annealed or that have been annealed, speroidized, normalized and tempered before cold finishing. Tis table does not include tolerances for bars that are normalized or normalized and tempered, after cold finishing.
Note: The Tolerances on Flats apply to thickness as well as width.

STRESSPROOF
SIZE RANGE
In Inches
TOLERANCES
(Tolerances, in decimals of an inch, provide
for undersized variation only)
ROUNDS
1/4" - 1-1/2" Incl. .004"
Over 1-1/2" to 2-1/2" Incl. .005"
Over 2-1/2" to 4" Incl. .006"
Over 4" to 5" Incl. .007"
HEXAGONS
1/4" to 3/4" Incl. .004"
Over 3/4" to 1-1/2" Incl. .005"
Over 1-1/2 to 2" Incl. .006"
"E.T.D." 150
SIZE RANGE
In Inches
TOLERANCES
(Tolerances, in decimals of an inch, provide
for undersized variation only)
ROUNDS
1/4" - 1-1/2" Incl. .005"
Over 1-1/2" to 2-1/2" Incl. .006"
Over 2-1/2" to 3-1/2" Incl. .006"
Over 4" to 5" Incl. .007"

RECOMMENDED STOCK REMOVAL
The following formula is the generally accepted industry standard for calculating allowable seam depth
NON-RESULPHURIZED GRADES
Grade Spec
1018, 1045 .001 per side for each 1/16" diameter
RESULPHURIZED GRADES
Grade Spec
1117, 1137
Nu-Standard (1114)
Stressproof (1114)
1215, 12L14
12L14 Tellurium
.0015 per side for each 1/16" diameter

TOLERANCES, IN DECIMALS OF AN INCH, PROVIDE FOR UNDERSIZE VARIATIONS ONLY
C-1045 COLD DRAWN GROUND AND POLISHED TURNED, GROUND AND POLISHED
SIZE RANGE
IN INCHES
Not
Heat
Treated
Heat
Treated
Not
Heat
Treated
Heat
Treated
To 1-1/2" Incl. (Note) .001" .001" .001" .001"
Over 1-1/2" to less than 2-1/2" .0015" .0015" .0015" .0015"
2-1/2" to 3" Incl. .002" .002" .002" .002"
Over 3" to 4" Incl. .003" .003" .003" .003"
(Note) Tolerances may be taken over or under the finished size on sizes 1-1/2" and under.